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Published on: February 14, 2022
Detection of a trailing (L5) Neptune Trojan
Scott S Sheppard1, Chadwick A Trujillo
1Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, USA. sheppard@dtm.ciw.edu
Science (New York, N.Y.)
|August 14, 2010
Summary
Scientists discovered Neptune Trojan 2008 LC18, revealing similar populations in leading and trailing regions. This suggests Neptune captured Trojans during migration, impacting our Solar System
Area of Science:
- Astronomy and astrophysics
- Solar System dynamics
- Planetary science
Background:
- The orbits of small Solar System bodies provide insights into Solar System history.
- Neptune Trojans are objects sharing Neptune's orbit, located in stable Lagrangian points.
- Understanding Trojan populations helps reconstruct planetary migration and early Solar System conditions.
Purpose of the Study:
- To report the detection of a new Neptune Trojan, 2008 LC18.
- To compare the populations and dynamics of leading (L4) and trailing (L5) Neptune Trojan regions.
- To infer the capture mechanism of Neptune Trojans based on observed orbital characteristics.
Main Methods:
- Detection and orbital characterization of the Neptune Trojan 2008 LC18.
- Estimation of population sizes and dynamical properties for both leading and trailing Trojan regions.
- Analysis of orbital inclinations to understand population distribution.
Main Results:
- Detection of 2008 LC18, a Neptune Trojan located in the trailing (L5) Lagrangian region.
- Estimation of similarly sized populations in both leading and trailing Neptune Trojan regions.
- Observation that both Trojan populations are dominated by high-inclination objects.
Conclusions:
- The similar populations and dynamics of leading and trailing Neptune Trojans suggest a common capture mechanism.
- Neptune Trojans were likely captured by a migrating and eccentric Neptune.
- The capture occurred within a dynamically excited planetesimal population, shaping the early Solar System.
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